Two-phase sample size estimation with pre-assignedvariance under normality assumption
We develop a two phase sampling procedure to determine the sample size necessary to estimate the population mean of a normally distributed random variable and show that the resulting estimator has preassigned variance and is unbiased under a regular condition. We present a necessary and sufficient condition under which the final sample mean is an unbiased estimator for the population mean. ? Shiraz University.
- Mathematics, Statistics & Physics [114 items ]